This is how i used todo my for loops, it's called post-increment:

for ($i = 0; $i < 10; $i++) {}

• the value of $i copied to an internal temporary variable
• $i is incremented
• the internal copy of the old value of $i is returned

This is called pre-increment and it's 10% faster!

for ($i = 0; $i < 10; ++$i) {}

• $i is incremented
• the new value is returned